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There are 5 gifts in a bag, of which 3 are cash and 2 are movie tickets, one person selects 2 of them without replacement. What is the probability that at least one cash bag could be selected?
Give your answer as a fraction.
Give your answer as a fraction.
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· 相关考点
6.4.4 条件概率
6.4.4 条件概率
以上解析由 考满分老师提供。
